LAST UPDATED: 2022-10-16
This report contains a list of accessible SMTP servers found by our daily IPv4 full Internet scans. This is just a population scan – there are no vulnerabilities being reported – but network owners should be aware of any unintentional SMTP server exposure and should verify all are patched to the latest software version.
This is just a population/external surface exposure scan. If you prefer not to receive it, contact us to opt-out.
You can track latest SMTP scan results on the Shadowserver Dashboard.
For more information on our scanning efforts, check out our Internet scanning summary page.
This report comes in 2 versions, IPv4 and IPv6.
Filenames: scan_smtp, scan6_smtp